Home / 28,358.84-39,069.68-20,387.28

Finding the Fourth Proportional to 28,358.84, 39,069.68 and 20,387.28

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Solution

The fourth proportional to 28,358.84, 39,069.68 and 20,387.28 is: 28,087.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.84 : 39,069.68 = 20,387.28 : x
  2. Step 2: Convert to fraction form
    28,358.84/39,069.68 = 20,387.28/x
  3. Step 3: Cross multiply
    28,358.84x = 39,069.68 × 20,387.28
  4. Step 4: Simplify right side
    28,358.84x = 796,524,505.67
  5. Step 5: Solve for x
    x = 796,524,505.67/28,358.84
  6. Step 6: Final answer
    x = 28,087.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.